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目前深空探测任务中广泛采用的测距体制为宽带转发模式,这种体制在转发有用测距信号的同时将上行信道噪声也转发下来,导致星上功率利用率降低。若采用再生伪码测距体制,则避免了转发过程,极大地提高了星上的功率利用效率,因而代表了未来深空探测任务测距体制的发展方向。CCSDS于2009年3月发布了伪码测距的蓝皮建议书,提供了伪码测距的国际标准。介绍CCSDS建议的伪码测距体制,研究其捕获和跟踪性能,并讨论其在深空探测任务中的应用。
Currently, the ranging system widely used in deep space exploration missions is a broadband forwarding mode. This system forwards useful channel signals while forwarding useful ranging signals, resulting in a reduction in on-board power utilization. If the pseudo-pseudo-ranging system is adopted, the forwarding process is avoided and the power utilization efficiency of the satellite is greatly improved, thus representing the development direction of the future deep space exploration mission ranging system. In March 2009, CCSDS released a blue-skinned proposal for pseudo-code ranging that provides an international standard for pseudo-code ranging. This paper introduces the pseudo-code ranging system proposed by CCSDS, studies its acquisition and tracking performance, and discusses its application in deep space exploration mission.